Two lines and a Transversal

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

What are corresponding angles?

Back

Corresponding angles are the angles that are in the same position on two parallel lines in relation to a transversal. They are equal.

Front

What are alternate interior angles?

Back

Alternate interior angles are the pairs of angles on opposite sides of the transversal but inside the two lines. They are equal when the lines are parallel.

Front

What are supplementary angles?

Back

Supplementary angles are two angles that add up to 180°.

Front

What are same side interior angles?

Back

Same side interior angles are the pairs of angles on the same side of the transversal and inside the two lines. They are supplementary when the lines are parallel.

Front

If ∠1 = 55°, what is the measure of ∠5 if they are corresponding angles?

Back

∠5 = 55° (corresponding angles are equal).

Front

If ∠2 = 135°, what is the measure of ∠6 if they are alternate interior angles?

Back

∠6 = 135° (alternate interior angles are equal).

Front

If two angles are a linear pair, what is their relationship?

Back

Linear pairs are two adjacent angles that are supplementary, meaning they add up to 180°.

Front

What is the relationship between alternate exterior angles when two lines are parallel?

Back

Alternate exterior angles are equal when the lines are parallel.